Developmental heat sum influences recalcitrant seed traits in Aesculus hippocastanum across Europe
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New Phytologist - 2004 - Daws - Developmental heat sum influences recalcitrant seed traits in Aesculus hippocastanum across
Materials and Methods Seed lot details Seeds were collected from various European locations (Table 1) in September / October 2002 and sent by air-freight to Wakehurst Place, UK. Seeds were collected from a minimum of five trees per location and dispatched within 3 d of collection. To allow a comparison of seed development times and environmental conditions during development, the timing of flower fall was recorded at each seed location. This Table 1 Some characteristics of the five seed lots of Aesculus hippocastanum studied Seed lot End of flowering Seed fall/ collection date Degree days ( °C d) Fresh mass (g) Moisture content (% f. wt) Whole seed dry mass (g) Axis osmotic potential (MPa) Embryonic axis Whole seed Aberdeen, Scotland 6/6/02 12/10/02 1666.1 3.5 ± 0.2 a 76.6 ± 1.5 a 69.0 ± 1.9 a 1.2 ± 0.1 a −2.1 ± 0.1 (57 °10′ N 2°04′ W) (73.5 ± 1.4) (68.4 ± 2.5) (1.16 ± 0.5) Sowiniec, Poland 15/5/02 15/9/02 2205.4 13.8 ± 0.5 b 64.9 ± 0.8 b 46.6 ± 0.6 b 7.4 ± 0.2 b −2.3 ± 0.0 (52 °25′ N 16°53′ E) Wakehurst Place, England 31/5/02 26/10/02 2158.2 15.5 ± 0.5 c 69.2 ± 0.8 c 49.0 ± 1.0 c 7.8 ± 0.2 b −2.4 ± 0.0 (51 °03′ N 0°06′ W) Angers, France 9/5/02 21/9/02 2396.5 16.2 ± 0.4 cd 60.7 ± 0.8 d 42.3 ± 0.5 d 9.4 ± 0.3 c −2.7 ± 0.1 (47 °9′ N 0°32′ W) (58.8 ± 0.8) (45.5 ± 0.7) (9.9 ± 0.64) Mt Parnes, Greece 25/5/02 17/10/02 2583.7 17.1 ± 0.3 d 59.7 ± 0.2 d 41.9 ± 0.2 d 9.9 ± 0.2 c −3.0 ± 0.2 (38 °10′ N 23°45′ E) Figures in brackets refer to results of a small scale preliminary study conducted in 2001 using seeds from Scotland and France. Values are ± 1 SE of the mean. Values within the same column were compared by One-way ANOVA , followed by Fisher’s LSD test. Those followed by the same letter are not significantly different (P > 0.05). 14698137, 2004, 1, Downloaded from https://nph.onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2004.01012.x by Uzbekistan Hinari NPL, Wiley Online Library on [02/06/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License © New Phytologist (2004) 162: 157–166 www.newphytologist.org Download 204.94 Kb. Do'stlaringiz bilan baham: |
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